Overshot fishing socket



v J. D. WADE ovERsHoT FISHING SOCKET Filed April z, 1925 latented May 27, 1924.

JAI/IES D. WADE, 0F GONZALES, TEXAS.

ovnnsnor rrsHING SOCKET.

Applicationv filed April 2, 1923. Serial No. 629,300.

T 0 all whom t may concern.' f

Be it known that I, JAMES D. WADE, a citizen of the United States, residing at Gonzales, Gonzales County, Texas, have in vented a certain new and useful Improvement in Overshot Fishing Sockets, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in fishing tools for use particularly in removing broken pipe or rods from wells during oil well drilling and pumping operations.

The object is to provide a nipplev or socket to be secured on the lower end of a drill stem or pipe which will engage the broken ends of pipe or rods and retain them while they are being raised from the well.

Another object is to provide a spear or nipple of the overshot type with its lower face so threaded as to work the junk toward the center of the hole where it can be engaged within the socket.

These and other objects and advantages will be more clearly set forth in the following specification:

Referring to the drawing, Fig. 1 is a central vertical section through a preferred form of my invention; Fig. 2 is a bottom p lan view thereof; and Fig. 3 is a top plan view.

The head 1 of my socket is cylindrical in general outline, having a tapered upper shank 2 threaded for attachment to a drill stem not shown. The head has a central bore 3 tapered upwardly from the lower end and having an interrupted thread l thereon. This thread is a right hand thread and is adapted to engage the broken pipe when the device is rotated ina right hand direction. The thread is interrupted by cutting longitudinal flutes 5 in the bore, said flutes having a sharp shoulder 6 presented in the di rection of rotation so as to better cut threads on the broken pipe and hold it.

The lower end of the head is reduced in diameter and threaded at 7 for attachment to a shoe 8. This shoe is provided with vertical ilutes 9 corresponding to those in the head and threaded. Toward the lower end the inner surface is flared outwardly at 10.

The lower end of the shoe has a fiat annular face 11 on which are formed a series of spiral threads, 12. As shown particularly in Fig. 2 the threads 12 are extended from the inner edge gradually outward in a spiral line to the outer edge and in a direction such that, when the tool is rotated in a'right hand directionl as seen from above, the threadswill 'act on the upper end of the pipe or rod and draw it to the center where the head will telescope down over it. The threads are made strong but with a sharp crest best adapted to act on the junk.

When in use the socket is let down into the well at the lower end of a drill stem. It is lowered down over the upper end of the broken pipe so as to seize it. Sometimes the broken pipe is standing in an inclined position with the upper end against the wall of the hole. The lower end of the slice rests upon the edge of the pipe but cannot telescope down over it. In such cases the drill stem and tool are rotated so as to catch the edge of the pipe with the threads 12 on .the shoe. The rotation of the shoe gradually works the pipe into the center of the shoe. When in this position the socket will drop' down over the broken pipe. The socket is then further rotated and the interrupted thread 4 cuts into the broken pipe and obtains a iirm grip thereon, after which the junk may be raised to the surface. The iuted portions 9 and 10 'of the shoe wear off the broken or rough edges of the junk so that it may be better caught by the screw threads above.

The advantages of this construction will be obvious; the tool will be adapted to engage and telescope over pipe or rods even when the said pipe stands at a diicult angle in the hole. The threaded iat end 11 has been found to be particularly effective.

Having thus described my invention, what I claim as new and desire to protect by Letters Patent is: 1

1. In a device of the'character described, a head having a central upwardly tapered bore therethrough, threads on said tapered bore, longitudinalutes cut in sa-id threads. a shoe having a flattened lower face, and threads formed on said face extending spi rally outward from the inner edge in the manner described.

2. In a device of the character described, a head having an upwardly tapered inner bore, an interrupted thread on said bore, a shoe on the lower end of said head, a lower iattened face on said shoe, and sharp crested threads formed on said face extending spirally outwardly from the inner edge, and longitudinal flutes on the inner surface ot sa-id shoe.

3. In a device of the character described, a head having an upwardly tapered inner threaded bore, a flattened lower face and sharp spirally eut threads on said face eX tending from one'edge of'said lower faee to the other.

4L. In a device of the character described, a tubular head, a shoe secured thereto, a flattened lower face thereon, means on said face adapted to act on the work to force it toward the center when said device is rotated, and means within said head to grip said work.

5. In a device of the character described,

a head, a shoe thereon7 a central upwardly tapered threaded bore therein, a lower horizontal face on said shoe, said face being formed toaet upon a pipe when the shoe is rotated in contact therewith to force said pipe into said bore in the manner described.

6. In a device of the character described, a head having an upwardly tapered bore therein, a lower horizontal surface on Said head having threads Jformed thereon so ar` ranged as to act on' a broken pipe when said threaded surface 1s rotated 1n Contact therewith and draw said pipe into said bore.

In testimony whereof, I hereunto alllX my signature this the 16 day of March, A. D. 1923. i

` JAMES D. WADE. 

